<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="../../vue.js"></script>
    <title>列表排序</title>
</head>
<style>
    #root {
        width: 500px;
        margin: 0 auto;
    }
</style>
<body>
    <div id="root">
        <h1>列表排序</h1>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sortType = 2">年龄升序</button>
        <button @click="sortType = 1">年龄降序</button>
        <button @click="sortType = 0">原顺序</button>
        <ul>
            <li v-for="item in filperson" :key="item.id">
                {{item.name}} -- {{item.age}} -- {{item.sex}}
                <input type="text">
            </li>
        </ul>
    </div>
</body>
<script>
    const vm = new Vue({
            data() {
                return {
                    keyWord: '',
                    sortType:0, // 0 原顺序 1 降序 2 升序
                    persons: [
                        { id: 01, name: '马冬梅', age: 19, sex: '女' },
                        { id: 02, name: '周冬雨', age: 18, sex: '女' },
                        { id: 03, name: '周杰伦', age: 20, sex: '男' },
                        { id: 04, name: '温兆伦', age: 21, sex: '男' }
                    ],
                }
            },
            computed:{
                filperson(){
                    const arr = this.persons.filter((p)=>{
                        return p.name.indexOf(this.keyWord) !== -1
                    })                                                                                                                                                                                                                                                                                                                                                                         
                    // 判断一下是否排序
                    if(this.sortType) {
                        arr.sort((p1,p2)=>{
                            return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age 
                        })
                    }
                    return arr
                }
            }
        }).$mount('#root')
</script>

</html>